<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
    <title>作业五第四题</title>
</head>
<body>

<form method="post" action="/work5question4">
    <table>
        <tr>
            <td>输入圆的半径的值</td>
            <td><input type="text" name="radius" value="${radius}"/></td>
        </tr>
        <tr>
            <td>面积</td>
            <td><input type="text" name="area" value="${area}"/></td>
        </tr>
        <tr>
            <td>周长</td>
            <td><input type="text" name="perimeter" value="${perimeter}"/></td>
        </tr>
        <tr>
            <td></td>
            <td><input type="submit" value="查看结果" /></td>
        </tr>
    </table>
    <p id="error" class="error" style="color: red">${error}</p>
</form>

</body>
</html>
